Write the conversation response. DIALOG:
[1]. What are the signs of portosystemic shunts in Tibetan spaniels?
[2]. Signs of portosystemic shunts include poor weight gain, sensitivity to sedatives (especially diazepam), depression, pushing the head against a solid object, seizures, weakness, salivation, vomiting, poor appetite, increased drinking and urinating, balance problems and frequent urinary tract disease or early onset of bladder stones.
[1]. Are these symptoms ever present?
[2]. 
A dramatic increase of these signs after eating is a strong supportive sign of a portosystemic shunt.